fmax

 

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Numerics

Common mathematical functions

Floating-point environment

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Type-generic math

 

Common mathematical functions

Functions
Basic operations
abslabsllabsimaxabs (C99) fabs divldivlldivimaxdiv (C99) fmod	remainder (C99) remquo (C99) fma (C99) fmax (C99) fmin (C99) fdim (C99) nannanfnanl (C99)(C99)(C99)
Exponential functions
exp exp2 (C99) expm1 (C99)	log log10 log1p (C99) log2 (C99)
Power functions
sqrt cbrt (C99)	hypot (C99) pow
Trigonometric and hyperbolic functions
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C99) acosh (C99) atanh (C99)
Error and gamma functions
erf (C99) erfc (C99)	lgamma (C99) tgamma (C99)
Nearest integer floating point operations
ceil floor roundlroundllround (C99)(C99)(C99)	trunc (C99) nearbyint (C99) rintlrintllrint (C99)(C99)(C99)
Floating point manipulation functions
ldexp scalbnscalbln (C99)(C99) ilogb (C99) logb (C99)	frexp modf nextafternexttoward (C99)(C99) copysign (C99)
Classification
fpclassify (C99)
isfinite (C99)
isinf (C99)
isnan (C99)
isnormal (C99)
signbit (C99)
Macro constants
HUGE_VALFHUGE_VALHUGE_VALL (C99)(C99)	FP_NORMALFP_SUBNORMALFP_ZEROFP_INFINITEFP_NAN (C99)(C99)(C99)(C99)(C99)

 

Defined in header <math.h>
float       fmaxf( float x, float y );		(since C99)
double      fmax( double x, double y );		(since C99)
long double fmaxl( long double x, long double y );		(since C99)

Returns the larger of two floating point arguments.

If one of the arguments is NaN, this function returns the other argument. If both arguments are NaNs, the function returns NaN.

Parameters

x, y

-

floating point values

Return value

The larger of two floating point values.

Example

Run this code

#include <stdio.h>
#include <math.h>
 
int main()
{
    printf ("fmax(2.0,1.0) = %.1f\n", fmax(2.0,1.0));
    printf ("fmax(NAN,1.0) = %.1f\n", fmax(NAN,1.0));
 
    return 0;
}

Possible output:

fmax(2.0,1.0) = 2.0
fmax(NAN,1.0) = 1.0

See also

fmin (C99)	smaller of two floating point values (function)
C++ documentation for fmax